ELECTROHYDRAULIC INJECTOR Russian patent published in 2000 - IPC

FIELD: electronic control of liquid fuel injection in cylinders of internal-combustion engines. SUBSTANCE: control box of injector accommodates piston interacting with needle valve that functions to shut off fuel supply to atomizing holes. Control valve of electrohydraulic injector is driven by electric actuator connected to its side surface. One end of control valve mounts bushing which is free to move along its valve. Inner space of bushing communicates with duct provided inside control valve with exit from control box. Bushing has normally closed back-pressure valve. Normally open back-pressure valve is made at inlet of injector control box. EFFECT: improved speed of control valves due to optimal use of hydraulic forces. 6 cl, 1 dwg